Now that you know the components of DNS and how they function, you're ready to design your own DNS system. Like all distributed network functions, your major goals are unbroken continuity of service, fast performance, minimum network traffic across the WAN, strong security, and a reasonably small need for administrative attention. We've already seen how primary and secondary DNS servers can be distributed to provide fault tolerance. This section covers these additional DNS features:
Deploying into an existing DNS infrastructure
Dynamic zone updates
Automated database scavenging
Active Directory integration
Secure DNS Updates
We'll take a look at each of these features from the viewpoint ...